126 lines
5.1 KiB
Markdown
126 lines
5.1 KiB
Markdown
# Frequently asked questions
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The up-to-date F.A.Q. page for PHPExcel can be found on
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<http://www.codeplex.com/PHPExcel/Wiki/View.aspx?title=FAQ&referringTitle=Requirements>.
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## There seems to be a problem with character encoding...
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It is necessary to use UTF-8 encoding for all texts in PhpSpreadsheet.
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If the script uses different encoding then you can convert those texts
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with PHP's iconv() or mb\_convert\_encoding() functions.
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## PHP complains about ZipArchive not being found
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Make sure you meet all requirements, especially php\_zip extension
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should be enabled.
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The ZipArchive class is only required when reading or writing formats
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that use Zip compression (Xlsx and Ods). Since version 1.7.6 the PCLZip
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library has been bundled with PhpSpreadsheet as an alternative to the
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ZipArchive class.
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This can be enabled by calling:
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``` php
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\PhpOffice\PhpSpreadsheet\Settings::setZipClass(\PhpOffice\PhpSpreadsheet\Settings::PCLZIP);
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```
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*before* calling the save method of the Xlsx Writer.
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You can revert to using ZipArchive by calling:
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``` php
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\PhpOffice\PhpSpreadsheet\Settings::setZipClass(\PhpOffice\PhpSpreadsheet\Settings::ZIPARCHIVE);
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```
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At present, this only allows you to write Xlsx files without the need
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for ZipArchive (not to read Xlsx or Ods)
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## Fatal error: Allowed memory size of xxx bytes exhausted (tried to allocate yyy bytes) in zzz on line aaa
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PhpSpreadsheet holds an "in memory" representation of a spreadsheet, so
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it is susceptible to PHP's memory limitations. The memory made available
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to PHP can be increased by editing the value of the memory\_limit
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directive in your php.ini file, or by using ini\_set('memory\_limit',
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'128M') within your code (ISP permitting).
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Some Readers and Writers are faster than others, and they also use
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differing amounts of memory. You can find some indication of the
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relative performance and memory usage for the different Readers and
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Writers, over the different versions of PhpSpreadsheet, on the
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[discussion
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board](http://phpexcel.codeplex.com/Thread/View.aspx?ThreadId=234150).
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If you've already increased memory to a maximum, or can't change your
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memory limit, then [this
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discussion](http://phpexcel.codeplex.com/Thread/View.aspx?ThreadId=242712)
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on the board describes some of the methods that can be applied to reduce
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the memory usage of your scripts using PhpSpreadsheet.
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## Protection on my worksheet is not working?
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When you make use of any of the worksheet protection features (e.g. cell
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range protection, prohibiting deleting rows, ...), make sure you enable
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worksheet security. This can for example be done like this:
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``` php
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$spreadsheet->getActiveSheet()->getProtection()->setSheet(true);
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```
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## Feature X is not working with Reader\_Y / Writer\_Z
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Not all features of PhpSpreadsheet are implemented in all of the Reader
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/ Writer classes. This is mostly due to underlying libraries not
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supporting a specific feature or not having implemented a specific
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feature.
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For example autofilter is not implemented in PEAR
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Spreadsheet\_Excel\_writer, which is the base of our Xls writer.
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We are slowly building up a list of features, together with the
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different readers and writers that support them, in the [features cross
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reference](./references/features-cross-reference.md).
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## Formulas don't seem to be calculated in Excel2003 using compatibility pack?
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This is normal behaviour of the compatibility pack, Xlsx displays this
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correctly. Use \PhpOffice\PhpSpreadsheet\Writer\Xls if you really need
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calculated values, or force recalculation in Excel2003.
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## Setting column width is not 100% accurate
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Trying to set column width, I experience one problem. When I open the
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file in Excel, the actual width is 0.71 less than it should be.
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The short answer is that PhpSpreadsheet uses a measure where padding is
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included. See section: "Setting a column's width" for more details.
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## How do I use PhpSpreadsheet with my framework
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- There are some instructions for using PhpSpreadsheet with Joomla on
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the [Joomla message
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board](http://http:/forum.joomla.org/viewtopic.php?f=304&t=433060)
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- A page of advice on using [PhpSpreadsheet in the Yii
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framework](http://www.yiiframework.com/wiki/101/how-to-use-phpexcel-external-library-with-yii/)
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- [The
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Bakery](http://bakery.cakephp.org/articles/melgior/2010/01/26/simple-excel-spreadsheet-helper)
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has some helper classes for reading and writing with PhpSpreadsheet
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within CakePHP
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- Integrating [PhpSpreadsheet into Kohana
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3](http://www.flynsarmy.com/2010/07/phpexcel-module-for-kohana-3/)
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and \[Интеграция PHPExcel и Kohana
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Framework\]\[http://szpargalki.blogspot.com/2011/02/phpexcel-kohana-framework.html\]
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- Using [PhpSpreadsheet with
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TYPO3](http://typo3.org/documentation/document-library/extension-manuals/phpexcel_library/1.1.1/view/toc/0/)
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### Tutorials
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- [English PHPExcel tutorial](http://openxmldeveloper.org)
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- [French PHPExcel
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tutorial](http://g-ernaelsten.developpez.com/tutoriels/excel2007/)
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- [Russian PHPExcel Blog
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Postings](http://www.web-junior.net/sozdanie-excel-fajjlov-s-pomoshhyu-phpexcel/)
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- [A Japanese-language introduction to
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PHPExcel](http://journal.mycom.co.jp/articles/2009/03/06/phpexcel/index.html)
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